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Windows 11 Windows 11 Insider 24H2 Insider Preview, Release Preview Channel
Windows Insider

Build 26100.8106

Build 26100.8106: Windows Insider Release Preview Channel, March 2026. Narrator image descriptions and Smart App Control settings

In short

Release Preview Insiders on Windows 11 24H2 and 25H2 get Narrator image descriptions with Copilot, except in the European Economic Area, plus a way to turn Smart App Control on or off without a clean install.

Does it affect you? Applies to: Devices enrolled in the Release Preview Channel running Windows 11 version 24H2 (build 26100.8106) or 25H2 (build 26200.8106).

Builds
26100.8106 · 26200.8106

This is a test build for people in the Windows Insider Program. Features in it can change, be removed, or never reach regular Windows releases.

What changes

Improvements 16 changes

Settings

Gradual rollout 2 items

For: everyone in the Release Preview Channel

  • The Home page in Settings loads faster.1
  • Necessary updates download more reliably when Settings prompts you to get them.2
    Applies to Settings > System > Advanced.

File Explorer

Gradual rollout

For: everyone in the Release Preview Channel

  • Files downloaded from the internet are more reliably unblocked so you can preview them in File Explorer.3

Display

Gradual rollout 4 items
  • With a native USB4 monitor connection, the USB controller can use its lowest power level while the PC sleeps, saving battery life.4
  • Auto rotation works more reliably after the PC wakes from sleep.5
  • HDR works more reliably on displays with non-compliant DisplayID 2.0 blocks.6
  • Monitors with DisplayID report a more accurate size through WMI monitor APIs.7

Printing

Gradual rollout

For: IT administrators managing printer connections

  • Printer connections support an updated baseline for older Windows versions.8
    The downlevel baseline is Windows 10, version 1607, or Windows Server 2016 (build 14393).

Windows Hello

Gradual rollout
  • Fingerprint sign-in works more reliably on certain devices.9

Safe mode

Gradual rollout

For: everyone in the Release Preview Channel

  • Taskbar components load more reliably in Safe mode.10

Voice Access

Gradual rollout

For: people using Voice Access in English

  • Voice Access detects and writes numbers more accurately in English.11

Start menu

Gradual rollout

For: IT administrators using Group Policy to set Start menu layouts

  • Start menu layouts apply more reliably through Group Policy when the JSON includes desktopAppLink.12

Remote Desktop

Gradual rollout

For: IT administrators managing Remote Desktop

  • A Remote Desktop configuration command now recognizes an additional setting.13
    Set-RDSessionCollectionConfiguration now recognizes DisableSeamlessLanguageBar.

Audio

Gradual rollout
  • Short MIDI messages are handled better when an application starts without providing long message buffers.14

Narrator

For: everyone in the Release Preview Channel

  • Narrator’s Natural Voices experience and setup are more reliable.15

Performance & Reliability

For: people running x64 apps on ARM64 devices

  • Windows Recovery Environment is more stable when x64 apps run on ARM64 devices; the apps run more smoothly and respond as expected.16

New features 10 changes

Narrator

Gradual rollout

For: Release Preview Insiders; on-device descriptions are for Copilot+ PCs

  • Narrator’s new image-description feature works with Copilot, but isn’t available in the European Economic Area.17
    On Copilot+ PCs, Narrator can also provide instant, on-device descriptions.

Smart App Control

Gradual rollout

For: everyone in the Release Preview Channel

  • You can turn Smart App Control on or off without a clean install.18
    When enabled, Smart App Control helps block untrusted or potentially harmful apps.

Settings

Gradual rollout 2 items
  • The About page has a clearer layout for device specifications and easier access to related settings, including Storage.19
  • The device information card on the Settings Home page makes key device details easier to scan and aligns them with the About page.20

Account Settings

Gradual rollout 2 items
  • Microsoft 365 Family subscribers can upgrade to another Microsoft 365 plan from Settings > Accounts.21
    Turn off Suggested content in Settings to remove the upgrade option.
  • Dialog boxes in Settings > Accounts > Other users have a modernized design and support dark mode.22
    Whether the dialog box option is visible depends on whether the device has a domain-joined work or school account.

Input

Gradual rollout

For: Release Preview Insiders using a pen

  • A new pen setting lets the pen tail button open the same app as the Copilot key.23
    The setting is called Same as Copilot key.

File Explorer

Gradual rollout 2 items

For: everyone in the Release Preview Channel

  • You can use Voice Typing to enter a name when renaming a file.24
    Open Voice Typing with Windows key + H.
  • You can sort a folder’s permission entries by principal in Advanced Security Settings.25

Display

Gradual rollout

For: people using supported monitors

  • Monitors can report refresh rates higher than 1,000 Hz.26

Fix 1 change

System File Checker

Gradual rollout

For: everyone in the Release Preview Channel

  • Running sfc /scannow no longer shows an unexpected extra error message.27

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-03-12
Type
Windows Insider build
VersionBuildChannel
24H2 26100.8106 Release Preview Channel
25H2 26200.8106 Release Preview Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (27)
  1. 1. Improved the performance of loading Home in Settings. blogs.windows.com
  2. 2. Improved reliability of downloading necessary updates when prompted in Settings > System > Advanced. blogs.windows.com
  3. 3. Improved reliability of unblocking files downloaded from the internet in order to preview them in File Explorer. blogs.windows.com
  4. 4. While using a native USB4 monitor connection, the USB controller can now go to the lowest power level while the PC is sleeping, saving battery life. blogs.windows.com
  5. 5. Improved reliability of auto rotation after resuming from sleep. blogs.windows.com
  6. 6. Improved HDR reliability for displays with non-compliant DisplayID 2.0 blocks. blogs.windows.com
  7. 7. Monitors with DisplayID now report a more accurate size when using the WMI monitor APIs. blogs.windows.com
  8. 8. Updated downlevel baseline support for printer connections to be Windows 10, version 1607 / Windows Server 2016 (Build 14393). blogs.windows.com
  9. 9. Improved: Windows Hello Fingerprint reliability for certain devices. blogs.windows.com
  10. 10. Improved reliability of loading components of the taskbar in safe mode. blogs.windows.com
  11. 11. Improved how numbers are detected and written when using Voice Access in English. blogs.windows.com
  12. 12. Improved reliability of applying Start menu layout via group policy when desktopAppLink is present in the JSON. blogs.windows.com
  13. 13. The Set-RDSessionCollectionConfiguration PowerShell command now recognizes DisableSeamlessLanguageBar. blogs.windows.com
  14. 14. Improved handling of short MIDI messages in cases where an application was initialized without providing long message buffers. blogs.windows.com
  15. 15. This update improves the Natural Voices experience in Narrator. It also makes Natural Voices setup more reliable. blogs.windows.com
  16. 16. This update improves stability in Windows Recovery Environment (Windows RE) when you run x64 apps on ARM64 devices. blogs.windows.com
  17. 17. This feature isn’t available in the European Economic Area. blogs.windows.com
  18. 18. You can turn Smart App Control (SAC) on or off without needing a clean install. blogs.windows.com
  19. 19. The Settings About page (Settings > System > About) has been improved to provide a more structured and intuitive experience, offering clearer device specifications blogs.windows.com
  20. 20. The device information card on the Settings Home page simplifies key device specifications and improves consistency across the end-to-end flow blogs.windows.com
  21. 21. Microsoft 365 Family subscribers can upgrade to a different Microsoft 365 plan from Settings > Accounts. blogs.windows.com
  22. 22. This update improves the design of the dialog boxes in Settings > Accounts > Other users to match the modern Windows look and support dark mode. blogs.windows.com
  23. 23. You can now choose the new Same as Copilot key option, which enables the pen tail button to open the same app as the Copilot key. blogs.windows.com
  24. 24. You can now use Voice Typing (Windows key plus H) when renaming a file in File Explorer. blogs.windows.com
  25. 25. You can now sort the permissions entries in the Advanced Security Settings window for a folder in File Explorer by Principal. blogs.windows.com
  26. 26. Monitors can now report refresh rates higher than 1000 Hz. blogs.windows.com
  27. 27. Removed extraneous error message you might unexpectedly see when running sfc /scannow. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 27 quoted passages
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 4/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake